Beam warping apparatus



May 11, 1954 s. FURST BEAM WARPING APPARATUS Filed Feb. 6, 1951 Invenfansame.

Patented May 11, 1954 UNITED STATES PATENT OFFICE BEAM WARPING APPARATUSStefan Fiirst, Gladbach, Germany, assignor to Walter Reiners, Waldniel(Niederrhein), Germany 14 Claims.

This invention relates to beam warping apparatus of the kind in whichbraking mechanisms are provided for braking one or more rotary memberswhose weight changes during the winding process, e. g. the beam and itsload of thread, and for braking one or more rotary members whose weightdoes not change, e. g. the driving roller which engages the winding ofthread on the beam and/or a measuring roller, when provided, over whichthe thread being wound on the beam passes.

As is well known it is important in such apparatus including a beam, adriving roller and a measuring roller to apply the brakes to the variousmembers in such a manner as to cause them to decelerate and stop insynchronism in order to avoid slipping between the thread on the beamand the driving or pressing roller and between the thread and themeasuring roller when provided. In practice, it has been found, however,that this cannot be achieved merely by providing a single operatingmember for the various braking mechanisms and a fixed adjustment for theindividual mechanisms, since the weight of the beam and its load ofthread changes according to the weight of the thread thereon whereas theweight of the driving or pressing roller and of the measuring rollerwhen provided rem the The object of the present invention is to providean improved beaming apparatus in which a closer approach to synchronismbetween the various braked members during the braking operation isobtained.

To this end, according to the present invention a beam warpingapparatus, having one or more rotary members whose weight changes duringthe thread winding process and one or more rotary members whose weightdoes not change,

is provided with a brake control mechanism which has a manually orautomatically operated ture of the invention, the brakes are of themechanical friction type and are operated by hydraulic or gas pressurederived from two cylinders one of which is connected to the brake orbrakes of the beam while the other is connected to the brake or brakesfor the part or parts whose weight does not vary, that is to say for thedriving or pressing roller, and for the measuring roller when provided.The pistons in the two cylinders are operated by a common floating leveron which an operating member acts through an adjusting device at a pointin the length of the beam which is varied by the adjusting device so asto vary the ratio of the forces applied respectively to the two pistonsand thus to the respective brakes for the parts of variable weight andfor the parts of invariable weight.

Preferably the adjusting device is moved automatically in accordancewith the weight of the beam and its load of thread, for example by meansof a movable member whose position is dependent upon the diameter of thewinding of thread upon the beam. For example, the beam may be journalledin arms which swing about an axis to maintain the thread on the beam incontact with the driving or pressing roller; and a cam and followerdevice or other operative connection may be provided for moving theadjusting device in dependence upon the swinging movement of one of thearms.

The invention may be carried into practice in various ways, oneembodiment of a beam warper according to the invention being showndiagrammatically and by way of example in the accompanying drawing.

The illustrated warper comprises a machine frame i which carries adriving roller '2 with a hydraulically operated brake 3, and a measuringroller with a hydraulically operated brake 5. A warp beam 6 with ahydraulically operated brake i is supported on arms 8 pivoted to theframe at 9.

One of the arms 8 is provided with a control cam Hi which acts on afollower lever H, l2. The lever is kept in contact with the cam by aspring 13 and is pivoted to frame i at Id.

The arm 12 of the lever Ii, i2 is connected by a link !5 to an adjustingdevice in the form of a swinging arm l5 pivoted at 58 to an operatingmember formed by a lever I l which is pivoted at 3 and is acted upon bya spring The spring 28, when so permitted, acts through the operatinglever H and the adjusting device it on a floating lever 2|. The twoopposite ends of the floating lever 2! act respectively on hydrauliopistons in two hydraulic cylinders 24 and 25.

The cylinder 24 is connected by pipes 2?, 28 to the operating cylindersof the hydraulic brakes 5 and 3 while the hydraulic cylinder 25connected by a pipe 25 to the operating cylinder of the hydraulic brakel.

The operation of the braking mechanism is as follows:

When the braking operation is initiated in known manner, the spring ispermitted to move the lever ll, through which the force applied by thespring is transmitted through the adjusting device 16 to the floatinglever 2i. The point which along the floating lever is acted upon by thedevice IS determines the ratio of the respective forces applied by thepistons to the liquid in the two cylinders 24 and and hence to thebrakes 3 and 4 on the one hand and the brake 1 on the other hand.

In the position of adjustment shown in the drawing the device [6 engagesthe floating lever 2i at about the centre of its length. Hencesubstantially the same force magnitudes are applied to the pistons inthe two cylinders 24 and 25. If the adjusting device I6 is displacedto-a diiferent position, for instance the one indicated at [6, suchdisplacement being due, for instance, to movement of arm 8 caused by achange in the quantity of the thread on beam 6, then the ratio of theforces applied to the pistons in the two cylinders 24 and 25 is changedcorrespondingly. The larger the diameter of the winding of thread uponthe beam '6, the greater is the force to the piston in cylinder'25 inrelation to that applied to the piston in cylinder 24. Thus, with asuitable'shape of cam [0, it is possible to ensure that, for differentweights of the beam and its load of thread, the ratio be tween thebraking forces applied respectively to the beam and to the rotarymembers of invariable weight is always approximately such that all themembers decelerate and stop substantially in synchronism.

It will also be seen that, regardless of the force magnitude applied byspring 20 to lever H, the ratio of the forces with which the brakes 3and i on the one hand and the brake I on the other hand are appliedwillremain the same for any given setting of the adjusting device I6.

It is to be understood that, although in the example shown in thedrawings the adjusting device i6 is arranged so as to be movedautomatically in accordance with the quantity of thread upon the beam,it may alternatively or in addition be arranged 'to be moved byhand intoany position suited to the weight of thread upon the beam.

What I claim as my invention and desire to secure by Letters Patent is:

1. Beam warping apparatus including a rotary beam, a roller arranged toengage the thread wound upon the beam, and braking apparatus for thebeam and the roller comprising separate braking mechanisms -respectivelyfor the beam and the roller, and operatingmechanism for the brakingmechanisms-including an operating member and an adjusting device the'setting of which determines the'ratio of the forces applied to theindividual braking-mechanisms by the operating member.

2. Beam warping apparatus including a rotary beam, a driving rollerarranged to engage the thread wound on the beam, ameasuring roller overwhich the thread passes onto the beam during the windingprocess, andbraking-apparatus for the beam and the driving and measuring rollerscomprising separate braking mechanisms respectively for the beam and forthe two rollers, and operating mechanism for the braking mechanismssai'd operating mechanisms having an operating member'and having anadjusting device whose setting determines the ratio of the forcesapplied respectively to the braking mechanism for the beam and to thebraking mechanism for the two rollers, said adjusting device beinginterposed between said operating member and said respective brakingmechanisms.

3. Beam warping apparatus as claimed in claim 1 including a deviceresponsive to variations in the quantity of thread wound on the beam,and an operative connection between said device and the adjustingdevice, causing movement of the adjusting device to vary its setting inaccordance with the quantity of thread on the beam.

4..Beam warping apparatus including a rotary beam, a driving rollerarranged to engage thethread wound on the beam, a measuring roller overwhich the thread passes onto the beam, hydraulically operated frictionbrakes acting respectively on the beam, the driving rollerand-themeasuring roller, a swinging arm supporting the beam and movableto maintain contact between the thread thereon and the driving roller, apressure cylinder connected by piping to the brakes for the drivingroller and the measuring roller, a second pressure cylinder connected bypipes to the brake for the beam, pressure applying pistons in the twopressure cylinders, a floating lever the ends of which act respectivelyon the two pressure applying pistons,

a brakeoperating member, an adjusting device acted upon by the brakeoperating member and acting on the floating lever at an intermediatepoint in its length, a cam on the swinging arm, and adjusting mechanismthrough which the cam when moved changes the position of the adjustingdevice and hence the point in the length of the floating lever at whichit acts.

5. Winding apparatus'for thread including a rotary member onto which thethread is wound, a driving roller engaging the thread Wound on the saidrotary member, brake mechanism for stopping the rotary member, brakemechanism for stopping the driving roller and operating mechanism forthe two brake mechanisms comprising an operating member and an operative.connection between the operating member and,

the two brake mechanisms including an adjusting devicethe setting ofwhich determines the ratio of the forces to be applied to the two brakeoperating mechanisms by the operating member.

6. Beam warping apparatus, comprising at least one rotary member havingan effective weight variable during winding operation and at least onerotary member of constant weight, braking devices connected with saidrespective rotary members for braking said members, a power supplymechanism for simultaneously actuating said braking devices, andvariable-ratio transmission means connecting said mechanism with saidrespective braking devices and having an adjusting device movable todifferent positions corresponding to respectively different ratios ofthe forces to be applied to said respective devices by said mechanism.

7. A beam warping apparatus, comprising a rotary thread-carrying memberhaving an effective weight variable during winding operation and arotary member of invariable weight, braking mechanisms joined with saidrespective rotary members, braking power supply means havinga movableoperating member, a floating lever having two points of junction withsaid respective mechanisms, an adjusting device connecting saidoperating member with a point of said lever intermediate-said twojunction points, said adjusting device being adjustable to shift saidintermediate point for varying the ratio of the forces to be applied tosaid braking mechanisms by said operating member.

8. In beam warping apparatus according to claim 7, said brakingmechanisms comprising respective hydraulic friction brakes engageablewith said respective rotary members, each brake having a brake controlcylinder and a piston movable in said cylinder, and said respectivepistons being linked with said floating lever at said respectivejunction points.

9. In beam warping apparatus according to claim 1, a floating leverhaving two junction points of a fixed mutua1 spacing at which said leveris linked with said respective braking mechanisms, and said adjustingdevice being in engagement with said lever at a point intermediate saidtwo junction points and being movable to shift said intermediate pointalong said lever.

10. In beam warping apparatus according to claim 2, said brakingmechanisms having respective operable friction brakes, two hydrauliccontrol devices each having a pressure cylinder and a piston in saidcylinder, one of said hydraulic devices being connected with said brakeof said beam, said other hydraulic device being connected with said twobrakes of said two rollers respectively, a lever linked at mutuallyspaced junction points with said two respective pistons, and saidadjusting device being in engagement with said lever at an adjustablepoint intermediate said two junction points.

11. Beam warpin apparatus, comprising a rotary beam member to carry awinding of thread material and having a roller rotatable simultaneouslywith said beam member, braking devices joined with said respectiverotary members, a power supply mechanism for simultaneously actuatingsaid braking devices, variable-ratio transmission means connecting saidmechanism with said respective braking devices and having an adjustingdevice movable to different positions corresponding to respectivelydifferent ratios of the forces applied to said respective devices bysaid mechanism, and control means responsive to the amount of threadupon said beam member and connected with said adjusting device formoving it in dependence upon the variation of said amount.

12. Beam warping apparatus according to claim 1, comprising pivotallymounted swing arms, said beam being journalled on said arms for pivotalmovement toward said roller to maintain contact between the roller andthe thread on the beam, and an operative connection between one of saidarms and said adjusting device whereby movement of said arms varies thesetting of said adjusting device.

13. In beam warping apparatus according to claim 1, a floating leverhaving two junction points of a fixed mutual spacing at which said leveris linked with said respective braking mechanisms, said adjusting devicebeing in engagement with said lever at a point intermediate said two:junction points and being movable to shift said intermediate point alongsaid lever.

14. In beam warping apparatus according to claim 1, comprising pivotallymounted swing arms, said beam being journalled on said arms for pivotalmovement toward said roller to maintain contact between the roller andthe thread on the beam, and an operative connection between one of saidarms and said adjusting device whereby movement of said arms varies thesetting of said adjusting device, said comiection comprising a cam onsaid one swing arm, and a cam follower engaging said cam and connectedto said adjusting device.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 2,356,365 Wiggerman Aug. 22, 1944 2,382,760 Wiggerman Aug. 14,1945 2,384,474 Lambach Sept. 11, 1945

